Bathtub



FIG. 1 is a perspective view of the bathtub showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an elevational view taken from one side thereof, the opposite side being a mirror image of the side shown;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof; and

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a bathtub, as shown and described. 